Polish-rod adjuster head



Dec. 4, 1923.

1,476,469 5. B. SARGENT POLISH ROD ADJUSTER HEAD Filed 001;. 5. 1922 A TTORNEYS Patented Dec. 4, 1923.

UNITED srn'ras 1,476,469 PATENT OFFICE.

SUMNER B. SABGEN'I, 01 LOS ANGELES, CALIFORNIA.

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Application filed October 3, 1922. Serial No. 592,082.

type employed in connecting the polish rod of a pump to the walking beam.

It is customary to employ a cable in connecting the polish rod of the pump to the walking beam, the opposite ends of the cable being connected with the polish rod and the intermediate portion thereof passing across a slot in one end of the walking beam, so that the hook of the hoisting apparatus can be readily hooked through the bight of the cable when it is desired to hoist the sucker line from the well. The cable employed is made from steel strands and the sharp bending of the cable at the corners of the walking beam and at the point where the hook of the hoisting apparatus engages it conduces toward rupture of the cable at these points.

An important object of this invention is to avoid the wear and breakage of the cable caused as above described.

The accompanying drawings illustrate the invention:

Figure 1 is a side elevation of a polish rod adjuster head constructed in accordance with the provisions of this invention, the

same being in place on one end of a walkin beam, which is fragmentarily shown. portion of one of the bosses is shown in section, and the hook of the hoisting apparatus is indicated in brokenlines in position for raising one section of the head from the other. A fragment of cable is shown in place on the head.

Fig. 2 is an elevation from the right of Fig. 1.

Fig. 3 is a front elevation of the upper section of the adjuster head as it appears suspended, with the cable attached thereto, from the hook of the hoisting apparatus.

There are provided separable members or sections, an upper section 4 and a lower section 5. The section 5 comprises a pairv of vertical parallel legs 6 of arcuate form in profile. Each leg is provided in its front face with an arcuate ve 7 to receive the upper end of the cable 8 constituting a portion of the means by which the adjuster head is connected to the polish rod of a pump. The legs 6 are provided with perforations 9 to receive bolts 10 which pass transversely through the walkin beam, fragmentarily indicated at 11, The lower section 5 is thus securely fixed to the walking beam.

The u per ends of the legs 6 are offset rearwar ly to'form shoulders 12, the offset portions constituting upstanding ears 13 through which extends a pin 14 that rests upon the upper face of the walking beam. The pin 14 1s mainly relied upon to take the load of the sucker line, pump and column of liquid being raised by the pumping operation. Mounted on the upper ends of the ears 13 are studs 16 which are detachably engaged by sockets 17 formed in rearwardly extending bosses 18 of the upper section 4.

The upper section 4 is otherwise constructed as follows:

' The bosses 18 project from the rear face of an arcuate member 19 having in its peripheral face an arcuate groove 20, the opposite ends of which register with the upper ends of the grooves 7 when the section 4 seats upon the shoulders 13 and the studs 16 are engaged in the sockets 17, as in Figures 1 and 2. The bight of the cable 8 engages the groove 20, which thus holds the cable in the grooves 7.

The intermediate portion of the member 19 is above the level of the Pin 14 to form an opening 15 between the sections 4, 5, so that the book 21 of a hoisting apparatus can be readily inserted beneath the member 19, as indicated in broken lines in Figure 1 and in solid lines in Figure 3. Preferably the lower face of the member 19 is provided on each side of the center with a downwardly projecting lug 22, the lugs forming between them a notch 23 in which the hook 21 engages. Thus the lugs 22 prevent rotation of the upper section 4 about the book if the load should tend to cant said section to one side or the other.

The are in which the grooves 7 are constructed have their centers approximately coinciding with the axis about which the walking beam oscillates so that, in the up and down strokes of the walking beam, that portion of the cable 8 extending from the adjuster head to the polish rod will move in a path coinciding with the axis of the pump tubing in order not to deflect the sucker line. When itis desired to elevate the sucker line, the hook 21 of the hoisting. apparatus will be inserted beneath the member 19 and the hoisting apparatus will then be operated to lift the upper section 4 of the head off of the studs 16 and free from the walking beam and lower section 5, as shown in Fi re 3.

claim:

1. In a polish rod adjuster head, the combination of a lower section provided with cable grooves, and an upper section detachably seated on the lower section and provided with an arcuate cable groove registering with the upper ends of the first cable grooves.

2. In a polish rod adjuster head, the combination of legs having arcuate cable grooves, a member connected with the upper ends of the legs and having an arcuate cable groove registering with the upper ends of the first grooves.

3. In a polish rod adjuster head, the

combination of legs having arcuate cable grooves, a pin connecting the upper ends of the legs, a member connected with the upper ends of the legs and having an arcuate cable groove registering with the upper ends of the first grooves.

4. In a polish rod adjuster head, a section adapted to be secured to an operating member, and a second section having a cable groove and detachably engaging the first section. v

5. In a polish rod adjuster head, a secs tion adapted to be secured to an operating member, and a second section having a cable groove and detachably engaging the first section, there being an opening between said sections to receive the hook of a hoisting apparatus.

Signed at Los Angeles, Calif. this 14th day of August, 1922.

SUMNER B. SARGENT. 

